Intel
®
Server Chassis P4304XXMFEN2/P4304XXMUXX Product Family System Integration and Service Guide
154
LED 3 LED 2 LED 1 LED 0
Description
Checkpoint
Nibble
(MSB)
4h 2h
(LSB)
Nibble
(MSB)
4h 2h
(LSB)
B2h
Nibble
ON off ON ON
Gather remaining SPD data.
Nibble
off off ON off
B3h
Nibble
ON off ON ON
Program registers on the memory
controller level.
Nibble
off off ON ON
B4h
Nibble
ON off ON ON
Evaluate RAS modes and save rank
information.
Nibble
off ON off off
B5h
Nibble
ON off ON ON
Program registers on the channel level.
Nibble
off ON off ON
B6h
Nibble
ON off ON ON
Perform the JEDEC defined initialization
sequence.
Nibble
off ON ON off
B7h
Nibble
ON off ON ON
Train DDR4 ranks.
Nibble
off ON ON ON
B8h
Nibble
ON off ON ON
Initialize CLTT/OLTT.
Nibble
ON off off off
B9h
Nibble
ON off ON ON
Hardware memory test and initialization.
Nibble
ON off off ON
BAh
Nibble
ON off ON ON
Execute software memory initialization.
Nibble
ON off ON off
BBh
Nibble
ON off ON ON
Program memory map and interleaving.
Nibble
ON off ON ON